Devonian Floras; a Study of the Origin of Cormophyta
The book Devonian Floras; a Study of the Origin of Cormophyta was written by author E a Newell Edward Alexander Newell Arber Here you can read free online of Devonian Floras; a Study of the Origin of Cormophyta book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Devonian Floras; a Study of the Origin of Cormophyta a good or bad book?
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20, 3) of which there is no evidence that they were formed in tetrads, or that they were heterosporous. These discs never overlap, though they coalesce occasionally. A grooved lamina (Fig. 20, 2) occurs on one side of the thaUus and is probably ventral. In general habit Don and Hickling compare Parka with the Fig. 20. Parka decipiens, Flem., from the Lower Old Red of Scotland: (1) a large thallus (natural size); (2) the folded lamina (x2); (3) spores ( X 150). After Don and Hickling (1917). Cor...alline Alga Melobesia (Lithophyllum) lichenoides, Ag. of the Rhodophyceae (Fig. 21) and they conclude that the thallus grew probably attached to or on the surface of mud or sand. With regard to the all-important question of affinity, Don and Hickling dissent entirely from the Dawsonian view that Parka was a sporocarp of "a somewhat generalised plant, shadowing forth the recent rhizocarps^." They regard it as a very low spore-bearing plant, belonging to a group which 1 Reid, Graham and Maenair (1897).
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